Search Results - "Saudan, Christophe"

Dihydrogen Reduction of Carboxylic Esters to Alcohols under the Catalysis of Homogeneous Ruthenium Complexes: High Efficiency and Unprecedented Chemoselectivity by Saudan, Lionel A, Saudan, Christophe M, Debieux, Catherine, Wyss, Patrick

“…The missing link: The presence of two N,P bridges in the ruthenium complexes used as catalysts for the title reaction is essential. Esters that contain…”
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Highly Selective Rhodium Catalyzed 1,4‐Hydrogenation of Conjugated Dienals by Saudan, Christophe M., Berrocosa, Aurélien, Quintaine, Julie, Spoehrle, Stéphanie, Maggi, Laurent, Mosimann, Hervé, Saudan, Lionel

“…The combination of a large bite‐angle diphosphine with a neutral rhodium complex in presence of a weak base has enabled the regio‐ and chemoselective…”
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Endogenous Steroid Profiling in the Athlete Biological Passport by Sottas, Pierre-Edouard, PhD, Saugy, Martial, PhD, PD, Saudan, Christophe, PhD

“…The Athlete Biological Passport (ABP) is an individual electronic document that collects data regarding a specific athlete that is useful in differentiating…”
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Detection in urine of 4-methyl-2-hexaneamine, a doping agent by Perrenoud, Laurent, Saugy, Martial, Saudan, Christophe

“…Stimulants are banned in-competition for all categories of sports by the World Anti-Doping Agency. A simple liquid chromatography–tandem mass spectrometry…”
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Validation and performance comparison of two carbon isotope ratio methods to control the misuse of androgens in humans by Saudan, Christophe, Emery, Caroline, Marclay, François, Strahm, Emmanuel, Mangin, Patrice, Saugy, Martial

“…Carbon isotope ratio of androgens in urine specimens is routinely determined to exclude an abuse of testosterone or testosterone prohormones by athletes…”
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Isolation and quantification by high-performance liquid chromatography–ion-trap mass spectrometry of androgen sulfoconjugates in human urine by Strahm, Emmanuel, Kohler, Isabelle, Rudaz, Serge, Martel, Sophie, Carrupt, Pierre-Alain, Veuthey, Jean-Luc, Saugy, Martial, Saudan, Christophe

“…Together with steroid glucuronides, sulfoconjugates may be used as markers of steroid administration as well as endogenous steroid production. A fast and…”
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[CpRu((R)-Binop-F)(H2O)][SbF6], a New Fluxional Chiral Lewis Acid Catalyst:  Synthesis, Dynamic NMR, Asymmetric Catalysis, and Theoretical Studies by Alezra, Valérie, Bernardinelli, Gérald, Corminboeuf, Clémence, Frey, Urban, Kündig, E. Peter, Merbach, André E, Saudan, Christophe M, Viton, Florian, Weber, Jacques

“…The C 2-symmetric electron-poor ligand (R)-BINOP-F (4) was prepared by reaction of (R)-BINOL with bis(pentafluorophenyl)-phosphorus bromide in the presence of…”
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Urinary analysis of 16(5α)-androsten-3α-ol by gas chromatography/combustion/isotope ratio mass spectrometry: implications in anti-doping analysis by SAUDAN, Christophe, BAUME, Norbert, MANGIN, Patrice, SAUGY, Martial

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A Stable and Recoverable Chiral Ru Lewis Acid: Synthesis, Asymmetric Diels-Alder Catalysis and Structure of the Lewis Acid Methacrolein Complex by Kündig, E. Peter, Saudan, Christophe M., Bernardinelli, Gérald

“…Ease of generation, stablity in solution at ambient temperature, high enantioselectivity in Diels–Alder reactions, efficient catalyst recovery, and large rate…”
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Profiling of 19-norsteroid sulfoconjugates in human urine by liquid chromatography mass spectrometry by Strahm, Emmanuel, Rudaz, Serge, Veuthey, Jean-Luc, Saugy, Martial, Saudan, Christophe

“…19-Nortestosterone (nandrolone) major metabolites in human urine are excreted as sulfoconjugated and glucuroconjugated forms. A sensitive and selective liquid…”
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Short-term stability of testosterone and epitestosterone conjugates in urine samples: Quantification by liquid chromatography–linear ion trap mass spectrometry by Saudan, Christophe, Entenza, José M., Baume, Norbert, Mangin, Patrice, Saugy, Martial

“…A simple method using liquid chromatography–linear ion trap mass spectrometry for simultaneous determination of testosterone glucuronide (TG), testosterone…”
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Chiral Cyclopentadienyl-Iron and -Ruthenium Lewis Acids Containing the Electron-Poor BIPHOP-F Ligand: a Comparison as Catalysts in an Asymmetric Diels-Alder Reaction by Kündig, E. Peter, Saudan, Christophe M., Viton, Florian

“…Chiral iron and ruthenium Lewis acids: analogies and differences between the catalysts and the role of the anion in catalytic Diels‐Alder reaction. In short:…”
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Direct detection and quantification of 19-norandrosterone sulfate in human urine by liquid chromatography-linear ion trap mass spectrometry by Strahm, Emmanuel, Saudan, Christophe, Sottas, Pierre-Edouard, Mangin, Patrice, Saugy, Martial

“…19-Norandrosterone sulfate (19-NAS) is the sulfoconjugated form of 19-norandrosterone (19-NA), the major metabolite of the steroid nandrolone. A sensitive and…”
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Denaturant-Induced Movement of the Transition State of Protein Folding Revealed by High-Pressure Stopped-Flow Measurements by Pappenberger, Günter, Saudan, Christophe, Becker, Michael, Merbach, André E., Kiefhaber, Thomas

“…The small all-β protein tendamistat folds and unfolds with two-state kinetics. We determined the volume changes associated with the folding process by…”
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Longitudinal profiling of urinary steroids by gas chromatography/combustion/isotope ratio mass spectrometry: Diet change may result in carbon isotopic variations by Saudan, Christophe, Kamber, Matthias, Barbati, Giulia, Robinson, Neil, Desmarchelier, Aurélien, Mangin, Patrice, Saugy, Martial

“…Longitudinal profiling of urinary steroids was investigated by using a gas chromatography/combustion/isotope ratio mass spectrometry (GC/C/IRMS) method. The…”
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Directed Molecular Evolution of Cytochrome c Peroxidase by Iffland, André, Tafelmeyer, Petra, Saudan, Christophe, Johnsson, Kai

“…Cytochrome c peroxidase (CCP) from Saccharomyces cerevisiae was subjected to directed molecular evolution to generate mutants with increased activity against…”
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[(Indenyl)Ru(biphop-F)](+): A Lewis Acid Catalyst That Controls both the Diene and the Dienophile Facial Selectivity in Diels-Alder Reactions This work was supported by the Swiss National Science Foundation (FNS grant 20-59374.99) and The Ministère des Affaires Etrangères from France (Lavoisier grant to V.A.). biphop-F=1,2-bis[bis(pentafluorophenyl)phosphanyloxy]-1,2-diphenylethane by Kündig, E. Peter, Saudan, Christophe M., Alezra, Valérie, Viton, Florian, Bernardinelli, Gérald

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Cover Feature: Highly Selective Rhodium Catalyzed 1,4‐Hydrogenation of Conjugated Dienals (ChemCatChem 18/2022) by Saudan, Christophe M., Berrocosa, Aurélien, Quintaine, Julie, Spoehrle, Stéphanie, Maggi, Laurent, Mosimann, Hervé, Saudan, Lionel

“…The Cover Feature shows in the background a picture of the Lily of the Valley “Muguet” flowers – a highly desired aroma in perfumery and inspiration for many…”
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From population- to subject-based limits of T/E ratio to detect testosterone abuse in elite sports by Sottas, Pierre-Edouard, Saudan, Christophe, Schweizer, Carine, Baume, Norbert, Mangin, Patrice, Saugy, Martial

“…Abstract In elite sports, indirect testing of testosterone abuse is mainly based on the testosterone over epitestosterone (T/E) ratio. Since this marker is…”
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Ruthenium Lewis Acid-Catalyzed Asymmetric Diels-Alder Reactions: Reverse-Face Selectivity for α,β-Unsaturated Aldehydes and Ketones by Thamapipol, Sirinporn, Ludwig, Bettina, Besnard, Céline, Saudan, Christophe, Kündig, E. Peter

“…Acrolein, methacrolein, methyl vinyl ketone, ethyl vinyl ketone, 3‐methyl‐3‐en‐2‐one, and divinyl ketone were coordinated to a cationic cyclopentadienyl…”
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